The NOVA Elongated Toilet Hinged Riser (8346-R) bolts directly to the toilet for added safety and adds 3.5" to the height of the toilet seat to aid in getting on and off the toilet. The hinged design allows the Toilet Riser to come up and down, makes cleaning easier and it can be used with original toilet seat and lid. Installs easily. For use with Elongated Toilet Seats.